The U.S. and Japanese governments are working to ensure "necessary security measures" put in place in response to death threats against Ambassador Caroline Kennedy, the State Department said on Wednesday.
U.S. State Department Spokesperson Jen Psaki said on Thursday that the U.S. stance on the Diaoyu Islands is unchanged.
The Obama administration declined on Thursday to discuss its possible response to Germany's expulsion of the representative of U.S. intelligence agencies in Berlin in a growing spy row.